How many types of modules present in Angular

SharedModule.ts

// shared module example
import { CommonModule } from '@angular/common';
import { NgModule } from '@angular/core';

import { CustomerComponent } from './components/customer/customer.component';
import { PercentagePipe } from './pipes/percentage/percentange.pipe';
import { CustomerStyleDirective } from './directives/customer-style/customer-style.directive';

@NgModule({
  imports: [ CommonModule ],
  exports: [
    CommonModule,
    CustomerComponent,
    PercentagePipe,
    CustomerStyleDirective 
  ],
  declarations: [ CustomerComponent, CustomerStyleDirective, PercentagePipe ]
})
export class SharedModule {}